Hello everyone, first time forum user here! Registered today just so I could get some advice. My current laptop is a 2006 15" MBP that has been on its last legs for a while now. Obviously anything I buy will be a huge improvement over what I have now, but keep in mind I want this new laptop to last 5+ years and be able to handle anything I throw at it. I'll be using Photoshop, Illustrator, InDesign, and Ableton regularly, and maybe a bit of video editing/3D rendering later on down the line. Which configuration would you go with and why? [A] $2510 13 2.8 i7/Iris/16GB/1TB $2310 15" 2.0 i7/Iris Pro/16GB/512GB [C] $2400 15" 2.3 i7/Iris Pro & 750M/16GB/512GB Since I'm coming from a 15" laptop, I think I'd be kind of disappointed with less real estate on the 13" but it just seems like better bang for your buck. I was hoping both rMBPs would get a substantial battery increase, at least 10 hours each, but I guess not. I can't believe the 13" Air gets 15 hours on Mavericks, and these just 8/9! If I go with the 13" I also don't get a quad core CPU or Iris Pro GPU/750M dGPU... will I notice any loss in performance doing what I plan to do?